Cate Blanchett has continued her domination of the Hollywood awards season with a win at the Screen Actors Guild awards.

Blanchett won the best actress award for her lead performance in Woody Allen's Blue Jasmine. The gong comes a week after she claimed a Golden Globe for the role and, on Thursday, was nominated for an Oscar.

The SAG win confirms her as an almost unbackable favourite for the best actress Oscar at the Academy Awards on March 2.

Good year for women: Cate Blanchett won the best actress award for Blue Jasmine at the Screen Actors Guild Awards. Photo: Getty Images

It is also a great omen. In 2005, when Blanchett won the supporting actress SAG award, she went on to win her first Oscar, best supporting actress for The Aviator.

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Blanchett, who played a New York socialite reduced to slumming with her sister in Blue Jasmine, said it had been an extraordinary year - decade, even - for female roles in cinema.

''It's impossible to even approach good work without working with good people,'' she said. ''So enter Woody Allen, who writes these things and directs these things with such alarming regularity that we sort of almost take him for granted.''